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JP7098189B2 - Secondary battery and battery module - Google Patents

Secondary battery and battery module Download PDF

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Publication number
JP7098189B2
JP7098189B2 JP2020549692A JP2020549692A JP7098189B2 JP 7098189 B2 JP7098189 B2 JP 7098189B2 JP 2020549692 A JP2020549692 A JP 2020549692A JP 2020549692 A JP2020549692 A JP 2020549692A JP 7098189 B2 JP7098189 B2 JP 7098189B2
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battery case
piezoelectric element
battery
hole
secondary battery
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JP2021516436A (en
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ハン・ヨン・イ
ジ・ス・イ
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LG Energy Solution Ltd
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LG Energy Solution Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/578—Devices or arrangements for the interruption of current in response to pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/20—Pressure-sensitive devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Description

［関連出願の相互参照］
本出願は、２０１９年２月１４日付韓国特許出願第１０－２０１９－００１７３３１号に基づいた優先権の利益を主張し、当該韓国特許出願の文献に開示された全ての内容は本明細書の一部として含まれる。 [Cross-reference of related applications]
This application claims the benefit of priority under Korean Patent Application No. 10-2019-0017331 dated 14 February 2019, and all the contents disclosed in the document of the Korean patent application are one of the present specification. Included as a part.

本発明は、二次電池及び電池モジュールに関し、より詳細には、非正常的な作動時、電池ケースの内部に生成されるガスを速く外部に排出して爆発を防止し、安定性を確保できる二次電池及び電池モジュールに関する。 The present invention relates to a secondary battery and a battery module, and more specifically, during abnormal operation, the gas generated inside the battery case can be quickly discharged to the outside to prevent explosion and ensure stability. Regarding secondary batteries and battery modules.

一般に、二次電池の種類としては、ニッケルカドミウム電池、ニッケル水素電池、リチウムイオン電池及びリチウムイオンポリマー電池等がある。このような二次電池は、デジタルカメラ、Ｐ－ＤＶＤ、ＭＰ３Ｐ、携帯電話、ＰＤＡ、ポータブルゲームデバイス（Ｐｏｒｔａｂｌｅ Ｇａｍｅ Ｄｅｖｉｃｅ）、パワーツール（Ｐｏｗｅｒ Ｔｏｏｌ）及びＥ－バイク（Ｅ－ｂｉｋｅ）等の小型製品だけでなく、電気自動車やハイブリッド自動車のような高出力が要求される大型製品と、余剰電力や再生可能エネルギーを貯蔵する電力貯蔵装置と、バックアップ用電力貯蔵装置にも適用され用いられている。 Generally, the types of secondary batteries include nickel cadmium batteries, nickel hydrogen batteries, lithium ion batteries, lithium ion polymer batteries and the like. Such secondary batteries are small products such as digital cameras, P-DVDs, MP3Ps, mobile phones, PDA, portable game devices (Portable Game Devices), power tools (Power Tool) and E-bikes (E-bike). Not only, it is also applied and used for large products such as electric vehicles and hybrid vehicles that require high output, power storage devices for storing surplus power and renewable energy, and power storage devices for backup.

電極組立体を製造するために、正極（Ｃａｔｈｏｄｅ）、分離膜（Ｓｅｐａｒａｔｏｒ）及び負極（Ａｎｏｄｅ）を製造し、これらを積層する。具体的に、正極活物質スラリーを正極集電体に塗布し、負極活物質スラリーを負極集電体に塗布して正極（Ｃａｔｈｏｄｅ）と負極（Ａｎｏｄｅ）を製造する。そして、前記製造された正極及び負極の間に分離膜（Ｓｅｐａｒａｔｏｒ）が介在されて積層されると単位セル（Ｕｎｉｔ Ｃｅｌｌ）が形成され、単位セルが互いに積層されることで、電極組立体が形成される。そして、このような電極組立体が特定ケースに収容され、電解液を注入すると二次電池が製造される。 In order to manufacture an electrode assembly, a positive electrode (Cathode), a separation membrane (Separator) and a negative electrode (Anode) are manufactured, and these are laminated. Specifically, the positive electrode active material slurry is applied to the positive electrode current collector, and the negative electrode active material slurry is applied to the negative electrode current collector to manufacture a positive electrode (Cathode) and a negative electrode (Anode). Then, when a separation film (Separator) is interposed and laminated between the manufactured positive electrode and the negative electrode, a unit cell (Unit Cell) is formed, and the unit cells are laminated with each other to form an electrode assembly. Will be done. Then, such an electrode assembly is housed in a specific case, and when an electrolytic solution is injected, a secondary battery is manufactured.

従来には、二次電池が高温に露出されるか、過充電又は過放電される等の非正常的に作動する場合、発熱によって分離膜が収縮しながら正極と負極が互いに直接接触し、短絡（ショート、Ｓｈｏｒｔ）が発生する可能性が高くなる。このような短絡によって電池内部に急激な電子移動が生じ、それにより発熱と副反応が発生すると二次電池が爆発し、安全性に問題が発生することがあった。特に、過充電、過放電、外部短絡等の電気的な誤作動の発生時、高い電流が流れ集電体の熱伝導率が低いため、集電体の温度が活物質層より高い熱が発生する。以後、熱が拡散して活物質、電解液等の構成要素の熱的、化学的、電気化学的な反応が加わって熱暴走まで繋がり得る。 Conventionally, when the secondary battery is exposed to a high temperature or is overcharged or overdischarged and operates abnormally, the positive electrode and the negative electrode come into direct contact with each other while the separation membrane shrinks due to heat generation, resulting in a short circuit. (Short, Short) is more likely to occur. Such a short circuit causes abrupt electron transfer inside the battery, which causes heat generation and side reactions, which may cause the secondary battery to explode, causing safety problems. In particular, when an electrical malfunction such as overcharge, overdischarge, or external short circuit occurs, a high current flows and the thermal conductivity of the current collector is low, so the temperature of the current collector is higher than that of the active material layer. do. After that, the heat diffuses and thermal, chemical, and electrochemical reactions of the constituent elements such as the active material and the electrolytic solution are added, which may lead to a thermal runaway.

本発明が解決しようとする課題は、非正常的な作動時、電池ケースの内部に生成されるガスを速く外部に排出して爆発を防止し、安定性を確保できる二次電池及び電池モジュールを提供することである。 The problem to be solved by the present invention is to provide a secondary battery and a battery module capable of ensuring stability by quickly discharging the gas generated inside the battery case to the outside during abnormal operation to prevent explosion. To provide.

本発明の課題は、以上で言及した課題に制限されず、言及されていない他の課題は、以下の記載から当業者において明確に理解され得る。 The subject matter of the present invention is not limited to the subject matter mentioned above, and other issues not mentioned above can be clearly understood by those skilled in the art from the following description.

前記課題を解決するための本発明の実施形態に係る二次電池は、電極及び分離膜を交互積層して形成される電極組立体と、前記電極組立体を内部に収容する電池ケースと、前記電池ケースにおいて前記電極組立体を収容するコップ部の外側に配置され、前記電池ケースの体積が膨張すると、圧力が印加されて外部に電力を供給する圧電素子と、一端が鋭く形成され、前記圧電素子から電力が印加されると、前記一端が前記電池ケースに向かって延伸し、前記電池ケースを打孔する打孔部とを含む。 The secondary battery according to the embodiment of the present invention for solving the above-mentioned problems includes an electrode assembly formed by alternately laminating electrodes and separation films, a battery case for accommodating the electrode assembly inside, and the above. It is arranged outside the cup portion that houses the electrode assembly in the battery case, and when the volume of the battery case expands, a piezoelectric element that applies pressure to supply power to the outside is sharply formed at one end, and the piezoelectric element is formed. When power is applied from the element, one end thereof extends toward the battery case, and includes a hole punching portion for drilling the battery case.

また、前記打孔部は、電気活性ポリマー（ＥＡＰ）からなることができる。 Further, the perforated portion can be made of an electroactive polymer (EAP).

また、前記圧電素子は、前記コップ部の外面に付着されてよい。 Further, the piezoelectric element may be attached to the outer surface of the cup portion.

また、前記圧電素子は、前記コップ部の中心部に付着されてよい。 Further, the piezoelectric element may be attached to the central portion of the cup portion.

また、前記圧電素子は、前記コップ部と形状が互いに対応していてよい。 Further, the piezoelectric element may have a shape corresponding to the cup portion.

また、前記圧電素子と連結された導線は、前記打孔部の他端に連結されてよい。 Further, the conducting wire connected to the piezoelectric element may be connected to the other end of the drilling portion.

また、前記打孔部は、前記電池ケースにおいて前記コップ部を打孔してよい。 Further, the hole-drilling portion may be used to make a hole in the cup portion in the battery case.

また、前記打孔部は、前記電池ケースのシーリング部に密着して形成されてよい。 Further, the hole-drilled portion may be formed in close contact with the sealing portion of the battery case.

また、前記打孔部の他端は、前記電池ケースの頂点に位置してよい。 Further, the other end of the hole may be located at the apex of the battery case.

また、前記打孔部は、前記電池ケースで周縁に沿って形成されるシーリング部の一部に密着して形成されてよい。 Further, the perforated portion may be formed in close contact with a part of the sealing portion formed along the peripheral edge of the battery case.

前記課題を解決するための本発明の実施形態による電池モジュールは、電極及び分離膜を交互積層して形成される電極組立体、前記電極組立体を内部に収容する電池ケース、前記電池ケースにおいて前記電極組立体を収容するコップ部の外側に配置され、前記電池ケースの体積が膨張すると、圧力が印加されて外部に電力を供給する圧電素子、及び、一端が鋭く形成され、前記圧電素子から電力が印加されると、前記一端が前記電池ケースに向かって延伸し、前記電池ケースを打孔する打孔部を含む二次電池と、前記二次電池を内部に収容するハウジングとを含む。 The battery module according to the embodiment of the present invention for solving the above-mentioned problems is an electrode assembly formed by alternately laminating electrodes and separation films, a battery case for accommodating the electrode assembly inside, and the battery case. A piezoelectric element is arranged outside the cup portion that houses the electrode assembly, and when the volume of the battery case expands, a pressure is applied to supply power to the outside, and one end is sharply formed to generate power from the piezoelectric element. Is applied, the one end extends toward the battery case, and includes a secondary battery including a hole punching portion for drilling the battery case, and a housing for accommodating the secondary battery inside.

また、前記打孔部は、電気活性ポリマー（ＥＡＰ）からなることができる。 Further, the perforated portion can be made of an electroactive polymer (EAP).

また、前記圧電素子は、前記ハウジングの内面に付着されてよい。 Further, the piezoelectric element may be attached to the inner surface of the housing.

また、前記打孔部は、前記ハウジングの内側角に沿って密着して形成されてよい。 Further, the hole punching portion may be formed in close contact with the inner corner of the housing.

また、前記打孔部は、前記電池ケースにおいて前記コップ部を打孔してよい。 Further, the hole-drilling portion may be used to make a hole in the cup portion in the battery case.

本発明は、また、前記電池モジュールを含む電池パックを提供し、前記電池パックを含むデバイスを提供する。 The present invention also provides a battery pack containing the battery module and provides a device containing the battery pack.

前記デバイスは、コンピューター、ノートパソコン、携帯電話、タブレットＰＣ、ウェアラブル電子機器、パワーツール（Ｐｏｗｅｒ Ｔｏｏｌ）と、電気自動車（Ｅｌｅｃｔｒｉｃ Ｖｅｈｉｃｌｅ、ＥＶ）、ハイブリッド電気自動車（Ｈｙｂｒｉｄ Ｅｌｅｃｔｒｉｃ Ｖｅｈｉｃｌｅ、ＨＥＶ）、プラグインハイブリッド電気自動車（Ｐｌｕｇ－ｉｎ Ｈｙｂｒｉｄ Ｅｌｅｃｔｒｉｃ Ｖｅｈｉｃｌｅ、ＰＨＥＶ）又は電力貯蔵装置等が挙げられるが、これに限定されるのではない。 The devices include computers, laptops, mobile phones, tablet PCs, wearable electronic devices, power tools, electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrids. Examples include, but are not limited to, electric vehicles (Plug-in Hybrid Electrical Vehicles, PHEVs) or power storage devices.

前記電池モジュール及びデバイスの構造及びそれらの製作方法は、当業界において公知されているため、本明細書では詳しい説明を省略する。 Since the structures of the battery modules and devices and the methods for manufacturing them are known in the art, detailed description thereof will be omitted here.

本発明のその他具体的な事項は、詳細な説明及び図面に含まれている。 Other specific matters of the present invention are included in the detailed description and drawings.

本発明の実施形態によれば、少なくとも次のような効果がある。 According to the embodiment of the present invention, there are at least the following effects.

非正常的な作動時、電池ケースの体積が膨張して圧電素子から電力が生成されると、打孔部が電池ケースを打孔することで、電池ケースの内部に生成されるガスを速く外部に排出して爆発を防止し、安定性を確保できる。 During abnormal operation, when the volume of the battery case expands and electric power is generated from the piezoelectric element, the hole punches the battery case, and the gas generated inside the battery case is quickly externalized. It can be discharged to prevent explosion and ensure stability.

本発明による効果は、以上で例示された内容によって制限されず、さらに多様な効果が本明細書内に含まれている。 The effects according to the present invention are not limited by the contents exemplified above, and further various effects are included in the present specification.

本発明の一実施形態による二次電池の組立図である。It is an assembly drawing of the secondary battery by one Embodiment of this invention. 本発明の一実施形態による二次電池の斜視図である。It is a perspective view of the secondary battery by one Embodiment of this invention. 本発明の一実施形態による二次電池の平面図である。It is a top view of the secondary battery by one Embodiment of this invention. 本発明の一実施形態による二次電池の断面拡大図である。It is sectional drawing of the secondary battery by one Embodiment of this invention. 本発明の一実施形態による二次電池の打孔部の一端が延伸された時の二次電池の平面図である。It is a top view of the secondary battery when one end of the hole punching portion of the secondary battery according to one embodiment of the present invention is stretched. 本発明の一実施形態による二次電池の打孔部の一端が延伸された時の二次電池の断面拡大図である。It is sectional drawing of the secondary battery when one end of the hole | punched portion of the secondary battery by one Embodiment of this invention is extended. 本発明の他の実施形態による電池モジュールの組立図である。It is an assembly drawing of the battery module by another embodiment of this invention. 本発明の他の実施形態による電池モジュールの打孔部の一端が延伸された時の電池モジュールの組立図である。It is an assembly drawing of the battery module when one end of the hole punching part of the battery module by another embodiment of this invention is extended.

本発明の利点及び特徴、そして、それらを達成する方法は、図と共に詳細に後述している実施形態を参照すれば明確になる。しかし、本発明は、以下で開示する実施形態に限定されるのではなく、互いに異なる多様な形態に具現されてよい。但し、本実施形態は、本発明の開示を完全にし、本発明が属する技術分野で通常の知識を有する者に発明の範疇を完全に伝えるために提供されるものであり、本発明は、請求項の範疇によって定義されるだけである。また、明細書の全体にかけて同一の参照符号は同一の構成要素を指す。 The advantages and features of the present invention, and the methods for achieving them, will be clarified by referring to the embodiments described in detail later together with the drawings. However, the present invention is not limited to the embodiments disclosed below, and may be embodied in various forms different from each other. However, the present embodiment is provided to complete the disclosure of the present invention and to fully convey the scope of the invention to a person having ordinary knowledge in the technical field to which the present invention belongs, and the present invention is claimed. It is only defined by the category of terms. Also, the same reference numerals throughout the specification refer to the same components.

他の定義がなければ、本明細書で用いられる全ての用語（技術及び科学的用語を含む）は、本発明が属する技術分野で通常の知識を有する者に共通的に理解される意味で用いられてよい。また、一般的に用いられる辞書に定義されている用語は、明らかに特別に定義されていない限り、理想的に又は過度に解釈されない。 Unless otherwise defined, all terms used herein (including technical and scientific terms) are used in the sense commonly understood by those with ordinary knowledge in the art to which the invention belongs. May be done. Also, terms defined in commonly used dictionaries are not ideally or over-interpreted unless clearly specifically defined.

本明細書で用いられた用語は、実施形態を説明するためのものであり、本発明を制限しようとするものではない。本明細書において、単数形は、文章で特別に言及しない限り、複数形も含む。明細書で用いられる『含む（ｃｏｍｐｒｉｓｅｓ）』及び／又は『含んで（ｃｏｍｐｒｉｓｉｎｇ）』は、言及された構成要素の以外に一つ以上の他の構成要素の存在又は追加を排除しない。 The terms used herein are for purposes of describing embodiments and are not intended to limit the invention. In the present specification, the singular form also includes the plural form unless otherwise specified in the text. As used herein, "comprises" and / or "comprising" do not preclude the presence or addition of one or more other components other than those mentioned.

以下、図を参照しつつ、本発明の好ましい実施形態を詳しく説明する。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

図１は、本発明の一実施形態による二次電池１の組立図である。図２は、本発明の一実施形態による二次電池１の斜視図である。 FIG. 1 is an assembly diagram of a secondary battery 1 according to an embodiment of the present invention. FIG. 2 is a perspective view of the secondary battery 1 according to the embodiment of the present invention.

本発明の一実施形態によれば、非正常的な作動時、電池ケース１３の体積が膨張して圧電素子１３５から電力が生成されると、打孔部１３６が電池ケース１３を打孔することで、電池ケース１３の内部に生成されるガスを速く外部に排出して爆発を防止し、安定性を確保できる。 According to one embodiment of the present invention, when the volume of the battery case 13 expands and electric power is generated from the piezoelectric element 135 during abnormal operation, the drilling portion 136 drills the battery case 13. Therefore, the gas generated inside the battery case 13 can be quickly discharged to the outside to prevent an explosion and ensure stability.

このために、本発明の一実施形態による二次電池１は、電極及び分離膜を交互積層して形成される電極組立体１０と、前記電極組立体１０を内部に収容する電池ケース１３と、前記電池ケース１３において前記電極組立体１０を収容するコップ部１３３の外側に配置され、前記電池ケース１３の体積が膨張すると、圧力が印加されて外部に電力を供給する圧電素子１３５と、一端１３６１が鋭く形成され、前記圧電素子１３５から電力が印加されると、前記一端１３６１が前記電池ケース１３に向かって延伸し、前記電池ケース１３を打孔する打孔部１３６とを含む。 For this purpose, the secondary battery 1 according to the embodiment of the present invention includes an electrode assembly 10 formed by alternately laminating electrodes and separation films, a battery case 13 for accommodating the electrode assembly 10 inside, and a battery case 13. A piezoelectric element 135, which is arranged outside the cup portion 133 for accommodating the electrode assembly 10 in the battery case 13, and when the volume of the battery case 13 expands, pressure is applied to supply power to the outside, and one end 1361. Is sharply formed, and when power is applied from the piezoelectric element 135, the one end 1361 extends toward the battery case 13 and includes a drilling portion 136 for drilling the battery case 13.

電極組立体１０は、電極及び分離膜を交互積層して形成する。先ず、電極活物質とバインダー及び可塑剤を混合したスラリーを正極集電体及び負極集電体に塗布して正極と負極を製造し、これを分離膜（Ｓｅｐａｒａｔｏｒ）の両側に積層することで所定形状の電極組立体１０を形成した後、電極組立体１０を電池ケース１３に挿入し電解液を注入してからシーリングする。 The electrode assembly 10 is formed by alternately laminating electrodes and separation membranes. First, a slurry in which an electrode active material, a binder, and a plasticizer are mixed is applied to a positive electrode current collector and a negative electrode current collector to produce a positive electrode and a negative electrode, and these are laminated on both sides of a separation film (Separator). After forming the electrode assembly 10 having a shape, the electrode assembly 10 is inserted into the battery case 13, the electrolytic solution is injected, and then sealing is performed.

具体的に、電極組立体（Ｅｌｅｃｔｒｏｄｅ Ａｓｓｅｍｂｌｙ）１０は、正極及び負極等の二種類の電極と、前記電極を互いに絶縁するために電極の間に介在される分離膜を含む。このような電極組立体１０には、スタック型、ゼリーロール型、スタック／フォールディング型等がある。二種類の電極、すなわち、正極と負極は、それぞれアルミニウムと銅を含む金属ホイル又は金属メッシュ形態の電極集電体に活物質スラリーが塗布された構造である。スラリーは、通常粒状の活物質、補助導体、バインダー及び可塑剤等が、溶媒が添加された状態で撹拌され形成されてよい。溶媒は後続の工程で除去される。 Specifically, the electrode assembly 10 includes two types of electrodes such as a positive electrode and a negative electrode, and a separation film interposed between the electrodes to insulate the electrodes from each other. Such an electrode assembly 10 includes a stack type, a jelly roll type, a stack / folding type, and the like. The two types of electrodes, that is, the positive electrode and the negative electrode, have a structure in which an active material slurry is applied to an electrode current collector in the form of a metal foil or a metal mesh containing aluminum and copper, respectively. The slurry may be formed by stirring usually granular active materials, auxiliary conductors, binders, plasticizers and the like with a solvent added. The solvent is removed in subsequent steps.

電極組立体１０は、図１に示された通り、電極タブ（Ｅｌｅｃｔｒｏｄｅ Ｔａｂ）１１を含む。電極タブ１１は、電極組立体１０の正極及び負極とそれぞれ連結され、電極組立体１０から一側の外部に突出し、電極組立体１０の内部と外部の間に電子が移動できる経路になる。電極組立体１０の集電体は、電極活物質が塗布された部分と電極活物質が塗布されていない末端部分、すなわち、非塗布部でなる。そして、電極タブ１１は、非塗布部を裁断して形成されるか又は非塗布部に別途の導電材を超音波溶接等で連結して形成されてもよい。このような電極タブ１１は、図１に示された通り、電極組立体１０の一側からそれぞれ異なる方向に並んで突出してもよいが、これに制限されずに同一の方向に突出してもよい。 The electrode assembly 10 includes an electrode tab (Electrode Tab) 11 as shown in FIG. The electrode tab 11 is connected to the positive electrode and the negative electrode of the electrode assembly 10, respectively, and protrudes from the electrode assembly 10 to the outside on one side, and serves as a path through which electrons can move between the inside and the outside of the electrode assembly 10. The current collector of the electrode assembly 10 is a portion coated with the electrode active material and a terminal portion not coated with the electrode active material, that is, a non-coated portion. The electrode tab 11 may be formed by cutting a non-coated portion, or may be formed by connecting a separate conductive material to the non-coated portion by ultrasonic welding or the like. As shown in FIG. 1, such electrode tabs 11 may project side by side in different directions from one side of the electrode assembly 10, but may project in the same direction without limitation. ..

電極組立体１０の電極タブ１１には、電極リード（Ｅｌｅｃｔｒｏｄｅ Ｌｅａｄ）１２がスポット（Ｓｐｏｔ）溶接等で連結される。そして、電極リード１２の一部は絶縁部１４で周りが囲まれる。絶縁部１４は、電池ケース１３の上部ケース１３１と下部ケース１３２が熱融着するシーリング部１３４に限定されて位置し、電極リード１２を電池ケース１３に接着させる。そして、電極組立体１０から生成される電気が電極リード１２を介して電池ケース１３に流れることを防止し、電池ケース１３のシーリングを維持する。よって、このような絶縁部１４は、電気がよく通らない非伝導性を有した不導体からなる。一般的に絶縁部１４としては、電極リード１２に付着しやすく、厚さが比較的薄い絶縁テープを多く用いるが、これに制限されず、電極リード１２を絶縁できれば多様な部材を用いてよい。 An electrode lead (Electrode Lead) 12 is connected to the electrode tab 11 of the electrode assembly 10 by spot welding or the like. Then, a part of the electrode lead 12 is surrounded by the insulating portion 14. The insulating portion 14 is located only in the sealing portion 134 where the upper case 131 and the lower case 132 of the battery case 13 are heat-sealed, and the electrode lead 12 is adhered to the battery case 13. Then, the electricity generated from the electrode assembly 10 is prevented from flowing to the battery case 13 through the electrode leads 12, and the sealing of the battery case 13 is maintained. Therefore, such an insulating portion 14 is made of a non-conductive nonconductor that does not conduct electricity well. Generally, as the insulating portion 14, an insulating tape that easily adheres to the electrode lead 12 and has a relatively thin thickness is often used, but the insulating tape is not limited to this, and various members may be used as long as the electrode lead 12 can be insulated.

電極リード１２は、一端が前記電極タブ１１と連結され、他端が前記電池ケース１３の外部にそれぞれ突出する。すなわち、電極リード１２は正極タブ１１１に一端が連結され、正極タブ１１１が突出した方向に延在する正極リード１２１及び負極タブ１１２に一端が連結され、負極タブ１１２が突出した方向に延在する負極リード１２２を含む。一方、正極リード１２１及び負極リード１２２は、図１に示された通り、何れも他端が電池ケース１３の外部に突出する。それにより、電極組立体１０の内部で生成された電気を外部に供給することができる。また、正極タブ１１１及び負極タブ１１２がそれぞれ多様な方向に向かって突出して形成されるため、正極リード１２１及び負極リード１２２もそれぞれ多様な方向に向かって延在し得る。 One end of the electrode lead 12 is connected to the electrode tab 11, and the other end of the electrode lead 12 projects to the outside of the battery case 13. That is, one end of the electrode lead 12 is connected to the positive electrode tab 111, one end is connected to the positive electrode lead 121 and the negative electrode tab 112 extending in the direction in which the positive electrode tab 111 protrudes, and the negative electrode tab 112 extends in the protruding direction. Includes negative electrode lead 122. On the other hand, as shown in FIG. 1, the other ends of the positive electrode lead 121 and the negative electrode lead 122 both project to the outside of the battery case 13. Thereby, the electricity generated inside the electrode assembly 10 can be supplied to the outside. Further, since the positive electrode tab 111 and the negative electrode tab 112 are formed so as to project in various directions, the positive electrode lead 121 and the negative electrode lead 122 can also extend in various directions, respectively.

正極リード１２１及び負極リード１２２は、互いにその材質が異なっていてよい。すなわち、正極リード１２１は正極集電体と同一のアルミニウム（Ａｌ）材質であり、負極リード１２２は負極集電体と同一の銅（Ｃｕ）材質又はニッケル（Ｎｉ）がコーティングされた銅材質であってよい。そして、電池ケース１３の外部に突出した電極リード１２の一部分は端子部となり、外部端子と電気的に連結される。 The positive electrode lead 121 and the negative electrode lead 122 may be made of different materials from each other. That is, the positive electrode lead 121 is made of the same aluminum (Al) material as the positive electrode current collector, and the negative electrode lead 122 is made of the same copper (Cu) material or nickel (Ni) coated copper material as the negative electrode current collector. It's okay. Then, a part of the electrode lead 12 protruding to the outside of the battery case 13 becomes a terminal portion and is electrically connected to the external terminal.

電池ケース１３は、軟性の材質からなるパウチである。以下、電池ケース１３は、パウチであるものとして説明する。電池ケース１３は、電極リード１２の一部、すなわち、端子部が露出されるように電極組立体１０を収容してシーリングされる。このような電池ケース１３は、図１に示された通り、上部ケース１３１と下部ケース１３２を含む。下部ケース１３２には、コップ部１３３が形成されて電極組立体１０を収容できる収容空間１３３１が設けられ、上部ケース１３１は、前記電極組立体１０が電池ケース１３の外部に離脱しないように前記収容空間１３３１を上部でカバーする。このとき、図１に示された通り、上部ケース１３１にも収容空間１３３１が設けられたコップ部１３３が形成され、電極組立体１０を上部で収容してもよい。上部ケース１３１と下部ケース１３２は、図１に示された通り、一側が互いに連結され製造されてよいが、これに制限されず、互いに分離され別途製造される等、多様に製造されてよい。 The battery case 13 is a pouch made of a soft material. Hereinafter, the battery case 13 will be described as being a pouch. The battery case 13 houses and seals the electrode assembly 10 so that a part of the electrode leads 12, that is, the terminal portion is exposed. As shown in FIG. 1, such a battery case 13 includes an upper case 131 and a lower case 132. The lower case 132 is provided with a storage space 1331 in which a cup portion 133 is formed and can accommodate the electrode assembly 10, and the upper case 131 accommodates the electrode assembly 10 so as not to be detached from the outside of the battery case 13. Space 1331 is covered by the upper part. At this time, as shown in FIG. 1, a cup portion 133 provided with a storage space 1331 may also be formed in the upper case 131, and the electrode assembly 10 may be stored in the upper part. As shown in FIG. 1, the upper case 131 and the lower case 132 may be manufactured by connecting one side to each other, but the upper case 131 and the lower case 132 may be manufactured in various ways, such as being separated from each other and manufactured separately.

圧電素子（Ｐｉｅｚｏｅｌｅｃｔｒｉｃ Ｅｌｅｍｅｎｔ）１３５は、前記コップ部１３３の外側に配置され、電池ケース１３の体積が膨張すると、圧力が印加されて外部に電力を供給する。そして、打孔部１３６は、一端１３６１が鋭く形成され、圧電素子１３５から電力が印加されると、前記一端１３６１が電池ケース１３に向かって延伸し、電池ケース１３を打孔する。圧電素子１３５及び打孔部１３６に対する詳しい説明は後述する。 The piezoelectric element 135 is arranged outside the cup portion 133, and when the volume of the battery case 13 expands, pressure is applied to supply electric power to the outside. One end of the hole 136 is sharply formed, and when electric power is applied from the piezoelectric element 135, the one end 1361 extends toward the battery case 13 to make a hole in the battery case 13. A detailed description of the piezoelectric element 135 and the drilling portion 136 will be described later.

電極組立体１０の電極タブ１１に電極リード１２が連結され、電極リード１２の一部分に絶縁部１４が形成されると、下部ケース１３２のコップ部１３３に設けられた収容空間１３３１に電極組立体１０が収容され、上部ケース１３１が前記空間を上部でカバーする。そして、内部に電解液を注入し上部ケース１３１と下部ケース１３２の縁に形成されたシーリング部１３４をシーリングする。電解液は、二次電池１の充電／放電時に電極の電気化学的反応によって生成されるリチウムイオンを移動させるためのものであり、リチウム塩と高純度の有機溶媒類の混合物である非水質系有機電解液又は高分子電解質を用いたポリマーを含んでよい。このような方法を介して、図２に示された通り、パウチ型二次電池１が製造されてよい。 When the electrode lead 12 is connected to the electrode tab 11 of the electrode assembly 10 and the insulating portion 14 is formed in a part of the electrode lead 12, the electrode assembly 10 is placed in the accommodation space 1331 provided in the cup portion 133 of the lower case 132. Is accommodated, and the upper case 131 covers the space at the upper part. Then, the electrolytic solution is injected into the inside to seal the sealing portion 134 formed on the edges of the upper case 131 and the lower case 132. The electrolytic solution is for moving lithium ions generated by the electrochemical reaction of the electrodes during charging / discharging of the secondary battery 1, and is a non-aqueous system which is a mixture of a lithium salt and high-purity organic solvents. It may contain a polymer using an organic electrolyte or a polymer electrolyte. Through such a method, the pouch type secondary battery 1 may be manufactured as shown in FIG.

図３は、本発明の一実施形態による二次電池１の平面図である。図４は、本発明の一実施形態による二次電池１の断面拡大図である。 FIG. 3 is a plan view of the secondary battery 1 according to the embodiment of the present invention. FIG. 4 is an enlarged cross-sectional view of the secondary battery 1 according to the embodiment of the present invention.

図３に示された通り、本発明の一実施形態による二次電池１は、圧電素子１３５及び打孔部１３６を含む。圧電素子１３５とは、圧力、応力等の物理的外力の印加を受けると、それによって電圧が発生し、逆に電圧の印加を受けると、形態が変形する素子である。代表的な圧電素子１３５としては、チタン酸バリウム（Ｂａｒｉｕｍ Ｔｉｔａｎａｔｅ）、ロッシェル塩（Ｒｏｃｈｅｌｌｅ ｓａｌｔ）等がある。 As shown in FIG. 3, the secondary battery 1 according to the embodiment of the present invention includes the piezoelectric element 135 and the drilling portion 136. The piezoelectric element 135 is an element whose shape is deformed when a voltage is generated when a physical external force such as pressure or stress is applied, and conversely, when a voltage is applied. Typical piezoelectric elements 135 include barium titanate, Rochelle salt, and the like.

圧電素子１３５は、電池ケース１３のコップ部１３３の外側に配置される。よって、電池ケース１３の内部にガスが発生し電池ケース１３の体積が膨張すると、圧力の印加を受ける。それにより圧電素子１３５で電圧が発生し、外部に電力を供給できる。特に、本発明の一実施形態によれば、圧電素子１３５はコップ部１３３の外面に直接付着されてよい。それにより、電池ケース１３の体積の膨張に敏感に反応し得る。すなわち、電池ケース１３の体積が少しだけ膨張しても、直ちに電圧を発生して外部に電力を供給できる。 The piezoelectric element 135 is arranged outside the cup portion 133 of the battery case 13. Therefore, when gas is generated inside the battery case 13 and the volume of the battery case 13 expands, pressure is applied. As a result, a voltage is generated in the piezoelectric element 135, and electric power can be supplied to the outside. In particular, according to one embodiment of the present invention, the piezoelectric element 135 may be directly attached to the outer surface of the cup portion 133. Thereby, it can react sensitively to the expansion of the volume of the battery case 13. That is, even if the volume of the battery case 13 expands slightly, a voltage can be immediately generated to supply electric power to the outside.

圧電素子１３５は、図３に示された通り、コップ部１３３と形状が互いに対応してよい。例えば、コップ部１３３が四角形の形状を有すると、圧電素子１３５も四角形の形状を有し、コップ部１３３が円形の形状を有すると、圧電素子１３５も円形の形状を有してよい。それにより、コップ部１３３が変形する時に変形される程度に比例して、圧電素子１３５が圧力の印加を受けることができる。 As shown in FIG. 3, the piezoelectric element 135 may correspond to the cup portion 133 in shape. For example, if the cup portion 133 has a quadrangular shape, the piezoelectric element 135 may also have a quadrangular shape, and if the cup portion 133 has a circular shape, the piezoelectric element 135 may also have a circular shape. As a result, the piezoelectric element 135 can receive pressure in proportion to the degree to which the cup portion 133 is deformed when it is deformed.

また、圧電素子１３５は、コップ部１３３の略中心部に付着されるのが好ましい。もし、電池ケース１３の内部にガスが発生するのであれば、最も柔軟性が大きいコップ部１３３が最も大きく変形する。このとき、圧電素子１３５がコップ部１３３の中心部に付着されることで、コップ部１３３が変形する時に圧電素子１３５が全体的に均一に圧力の印加を受けることができる。 Further, the piezoelectric element 135 is preferably attached to a substantially central portion of the cup portion 133. If gas is generated inside the battery case 13, the most flexible cup portion 133 is deformed most. At this time, since the piezoelectric element 135 is attached to the central portion of the cup portion 133, the piezoelectric element 135 can be uniformly applied with pressure when the cup portion 133 is deformed.

打孔部１３６は、細長いワイヤ形状を有してよく、圧電素子１３５から電力が印加されると、形態が変形し電池ケース１３を打孔する。このような打孔部１３６は、電気活性ポリマー（ＥｌｅｃｔｒｏＡｃｔｉｖｅ Ｐｏｌｙｍｅｒｓ、ＥＡＰ）からなることができる。電気活性ポリマーとは、電気的刺激によって膨張、収縮及びベンディング（ｂｅｎｄｉｎｇ）等に変形し得るポリマーである。代表的な電気活性ポリマーとしては、強誘電性ポリマー（Ｆｅｒｒｏｅｌｅｃｔｒｉｃ Ｐｏｌｙｍｅｒ）と誘電性エラストマー（Ｄｉｅｌｅｃｔｒｉｃ Ｅｌａｓｔｏｍｅｒ）等があり、特に、強誘電性ポリマーとして相対的に圧電性が大きいポリビニリデンフルオリド（Ｐｏｌｙｖｉｎｙｌｉｄｅｎｅ Ｆｌｕｏｒｉｄｅ、以下、ＰＶＤＦ）系ポリマーが広く用いられる。 The drilling portion 136 may have an elongated wire shape, and when electric power is applied from the piezoelectric element 135, the shape is deformed and the battery case 13 is drilled. Such a hole 136 can be made of an electroactive polymer (EAP). The electroactive polymer is a polymer that can be deformed into expansion, contraction, bending, etc. by electrical stimulation. Typical electrochemicals include a ferroelectric polymer and a dielectric elastomer, and in particular, a polyvinylidene fluoride fluid having a relatively high piezoelectricity as a ferroelectric polymer. , Hereinafter, PVDF) -based polymers are widely used.

打孔部１３６は、図４に示された通り、電池ケース１３のシーリング部１３４に密着して形成されてよい。それにより、打孔部１３６が二次電池１のサイズ及び形態を大きく変更せずとも、打孔部１３６が外部の摩擦によって損傷されることを防止できる。もし、打孔部１３６の長さがある程度長く形成されるのであれば、図３に示された通り、打孔部１３６は、電池ケース１３で周縁に沿って形成されるシーリング部１３４の一部に密着して形成されてよい。但し、これに制限されず、打孔部１３６は、電池ケース１３で電極組立体１０を収容するコップ部１３３の外面に沿って形成される等、電池ケース１３に多様な方法で形成されてよい。 As shown in FIG. 4, the drilling portion 136 may be formed in close contact with the sealing portion 134 of the battery case 13. Thereby, even if the drilling portion 136 does not significantly change the size and form of the secondary battery 1, it is possible to prevent the drilling portion 136 from being damaged by external friction. If the length of the hole 136 is formed to be long to some extent, as shown in FIG. 3, the hole 136 is a part of the sealing portion 134 formed along the peripheral edge of the battery case 13. It may be formed in close contact with. However, the perforation portion 136 may be formed in the battery case 13 by various methods, such as being formed along the outer surface of the cup portion 133 in which the electrode assembly 10 is housed in the battery case 13. ..

図５は、本発明の一実施形態による二次電池１の打孔部１３６の一端１３６１が延伸した時の二次電池１の平面図である。図６は、本発明の一実施形態による二次電池１の打孔部１３６の一端１３６１が延伸した時の二次電池１の断面拡大図である。 FIG. 5 is a plan view of the secondary battery 1 when one end 1361 of the drilling portion 136 of the secondary battery 1 according to the embodiment of the present invention is extended. FIG. 6 is an enlarged cross-sectional view of the secondary battery 1 when one end 1361 of the hole 136 of the secondary battery 1 according to the embodiment of the present invention is extended.

圧電素子１３５は、圧力の印加を受けると、電圧が発生して電力を外部に供給する。すなわち、電池ケース１３の内部にガスが発生して電池ケース１３の体積が膨張すると、圧電素子１３５は、圧力が印加されて電力を外部に供給する。そして、打孔部１３６は、一端１３６１が鋭く形成され、圧電素子１３５から電力が印加されると形状が変化する。特に、図５に示された通り、打孔部１３６の一端１３６１が電池ケース１３に向かって延伸し、電池ケース１３を打孔する。 When the pressure is applied, the piezoelectric element 135 generates a voltage to supply electric power to the outside. That is, when gas is generated inside the battery case 13 and the volume of the battery case 13 expands, the piezoelectric element 135 applies pressure to supply electric power to the outside. One end of the hole 136 is sharply formed, and the shape of the hole 136 changes when electric power is applied from the piezoelectric element 135. In particular, as shown in FIG. 5, one end 1361 of the drilling portion 136 extends toward the battery case 13 and drills the battery case 13.

打孔部１３６は、電池ケース１３中で、コップ部１３３を打孔するのが好ましい。それにより、電池ケース１３の内部と外部が連結され、電池ケース１３の内部に生成されるガスを速く外部に排出して爆発を防止し、安定性を確保できる。 It is preferable that the hole-drilling portion 136 is made by drilling the cup portion 133 in the battery case 13. As a result, the inside and the outside of the battery case 13 are connected, and the gas generated inside the battery case 13 is quickly discharged to the outside to prevent an explosion and ensure stability.

打孔部１３６の一端１３６１は、コップ部１３３の頂点付近ではなく、図５に示された通り、コップ部１３３の角の中心部に位置する。それにより、コップ部１３３の頂点付近より角の中心部の剛性が弱いため、打孔部１３６の一端１３６１が延伸した時、図６に示された通り、コップ部１３３が容易に打孔され得る。 One end 1361 of the drilling portion 136 is located not near the apex of the cup portion 133 but at the center of the corner of the cup portion 133 as shown in FIG. As a result, since the rigidity of the central portion of the corner is weaker than that near the apex of the cup portion 133, when one end 1361 of the drilling portion 136 is stretched, the cup portion 133 can be easily drilled as shown in FIG. ..

一方、打孔部１３６の他端１３６２は、コップ部１３３の角の中心部ではなく、図５に示された通り、コップ部１３３の頂点付近に位置する。そして、圧電素子１３５と連結された導線１３５１は、打孔部１３６の他端１３６２に連結される。それにより、圧電素子１３５と連結された導線１３５１が外部の障害物によって断線されるか破損されることを最小化できる。 On the other hand, the other end 1362 of the drilling portion 136 is not located at the center of the corner of the cup portion 133, but is located near the apex of the cup portion 133 as shown in FIG. Then, the conducting wire 1351 connected to the piezoelectric element 135 is connected to the other end 1362 of the drilling portion 136. Thereby, it is possible to minimize that the conductor 1351 connected to the piezoelectric element 135 is broken or damaged by an external obstacle.

図７は、本発明の他の実施形態による電池モジュール２の組立図である。 FIG. 7 is an assembly drawing of the battery module 2 according to another embodiment of the present invention.

本発明の一実施形態によれば、圧電素子１３５は、電池ケース１３のコップ部１３３の外面に直接付着され、打孔部１３６は、電池ケース１３のシーリング部１３４に密着して形成される。それにより、圧電素子１３５は、電池ケース１３の体積の膨張に敏感に反応でき、二次電池１のサイズ及び形態を大きく変更せずとも、打孔部１３６が外部の摩擦によって損傷されることを防止できる。 According to one embodiment of the present invention, the piezoelectric element 135 is directly attached to the outer surface of the cup portion 133 of the battery case 13, and the hole drilling portion 136 is formed in close contact with the sealing portion 134 of the battery case 13. As a result, the piezoelectric element 135 can react sensitively to the expansion of the volume of the battery case 13, and the drilling portion 136 is damaged by external friction without significantly changing the size and form of the secondary battery 1. Can be prevented.

ところで、本発明の他の実施形態によれば、二次電池１ａが電池モジュール２に組み立てられる場合には、圧電素子１３５ａ及び打孔部１３６ａが、二次電池１ａの電池ケース１３ではなく電池モジュール２のハウジング２０に形成されてよい。それにより、柔軟性を有するパウチ型電池ケース１３より、剛性を有するハウジング２０に圧電素子１３５ａ及び打孔部１３６ａを固定させることがより容易である。 By the way, according to another embodiment of the present invention, when the secondary battery 1a is assembled in the battery module 2, the piezoelectric element 135a and the drilling portion 136a are not the battery case 13 of the secondary battery 1a but the battery module. It may be formed in the housing 20 of 2. As a result, it is easier to fix the piezoelectric element 135a and the drilling portion 136a to the rigid housing 20 than the flexible pouch-type battery case 13.

本発明の他の実施形態による電池モジュール２は、電極及び分離膜を交互積層して形成される電極組立体１０、前記電極組立体１０を内部に収容する電池ケース１３、前記電池ケース１３において前記電極組立体１０を収容するコップ部１３３の外側に配置され、前記電池ケース１３の体積が膨張すると、圧力が印加されて外部に電力を供給する圧電素子１３５ａ、及び、一端１３６１ａが鋭く形成され、前記圧電素子１３５ａから電力が印加されると、前記一端１３６１ａが前記電池ケース１３に向かって延伸し、前記電池ケース１３を打孔する打孔部１３６ａを含む二次電池１と、前記二次電池１を内部に収容するハウジング２０とを含む。 The battery module 2 according to another embodiment of the present invention includes an electrode assembly 10 formed by alternately laminating electrodes and separation films, a battery case 13 containing the electrode assembly 10 inside, and the battery case 13 described above. A piezoelectric element 135a, which is arranged outside the cup portion 133 for accommodating the electrode assembly 10 and supplies power to the outside by applying pressure when the volume of the battery case 13 expands, and one end 1361a are sharply formed. When power is applied from the piezoelectric element 135a, the one end 1361a extends toward the battery case 13, and the secondary battery 1 including a hole hole 136a for drilling the battery case 13 and the secondary battery. Includes a housing 20 that houses 1 inside.

ハウジング２０は、二次電池１を内部に収容し、図７に示された通り、上部及び下部のハウジング２０が二次電池１の両側で互いに結合されることで、二次電池１を収容できる。このようなハウジング２０は、内部に二次電池１を一つだけ収容してもよいが、これに制限されず、複数の二次電池１を収容してもよい。 The housing 20 houses the secondary battery 1 inside, and as shown in FIG. 7, the upper and lower housings 20 are coupled to each other on both sides of the secondary battery 1 to accommodate the secondary battery 1. .. Such a housing 20 may accommodate only one secondary battery 1 inside, but is not limited to this, and may accommodate a plurality of secondary batteries 1.

本発明の他の実施形態による圧電素子１３５ａ及び打孔部１３６ａは、電池モジュール２のハウジング２０の内部に形成される。特に、圧電素子１３５ａは電池ケース１３のコップ部１３３の外側に配置され、但し、コップ部１３３の外面に直接付着されず、ハウジング２０の内面に付着される。但し、ハウジング２０の内面と電池ケース１３のコップ部１３３が非常に近接して位置しているため、電池ケース１３の内部にガスが発生して電池ケース１３の体積が膨張すると、圧電素子１３５ａは直ちに電力を外部に供給する。 The piezoelectric element 135a and the hole drilling portion 136a according to another embodiment of the present invention are formed inside the housing 20 of the battery module 2. In particular, the piezoelectric element 135a is arranged outside the cup portion 133 of the battery case 13, but is not directly attached to the outer surface of the cup portion 133, but is attached to the inner surface of the housing 20. However, since the inner surface of the housing 20 and the cup portion 133 of the battery case 13 are located very close to each other, when gas is generated inside the battery case 13 and the volume of the battery case 13 expands, the piezoelectric element 135a becomes Immediately supply power to the outside.

打孔部１３６ａは、ハウジング２０の内側角に沿って密着して形成される。そして、打孔部１３６ａは、細長いワイヤ形状を有してよく、圧電素子１３５ａから電力が印加されると、形態が変形して電池ケース１３を打孔する。このような打孔部１３６ａは、電気活性ポリマー（ＥｌｅｃｔｒｏＡｃｔｉｖｅ Ｐｏｌｙｍｅｒｓ、ＥＡＰ）からなることができる。 The drilling portion 136a is formed in close contact with each other along the inner corner of the housing 20. The hole-drilling portion 136a may have an elongated wire shape, and when electric power is applied from the piezoelectric element 135a, the shape is deformed to make a hole in the battery case 13. Such a perforated portion 136a can be made of an electroactive polymer (EAP).

図８は、本発明の他の実施形態による電池モジュール２の打孔部１３６ａの一端１３６１ａが延伸した時の電池モジュール２の組立図である。 FIG. 8 is an assembly diagram of the battery module 2 when one end 1361a of the drilling portion 136a of the battery module 2 according to another embodiment of the present invention is extended.

電池ケース１３の内部にガスが発生して電池ケース１３の体積が膨張すると、圧電素子１３５ａは、圧力が印加されて電力を外部に供給する。そして、打孔部１３６ａは、一端１３６１ａが鋭く形成され、圧電素子１３５ａから電力が印加されると、図８に示された通り、打孔部１３６ａの一端１３６１ａが電池ケース１３に向かって延伸し、電池ケース１３を打孔する。 When gas is generated inside the battery case 13 and the volume of the battery case 13 expands, pressure is applied to the piezoelectric element 135a to supply electric power to the outside. Then, when one end 1361a of the hole drilling portion 136a is sharply formed and power is applied from the piezoelectric element 135a, one end 1361a of the drilling portion 136a extends toward the battery case 13 as shown in FIG. , The battery case 13 is punched.

打孔部１３６ａは、電池ケース１３中で、コップ部１３３を打孔するのが好ましい。そして、打孔部１３６ａの一端１３６１ａは、コップ部１３３の角の中心部に位置する。それにより、打孔部１３６ａの一端１３６１ａが延伸した時、コップ部１３３が容易に打孔され得る。 It is preferable that the hole-drilling portion 136a is formed in the cup portion 133 in the battery case 13. One end 1361a of the drilling portion 136a is located at the center of the corner of the cup portion 133. As a result, when one end 1361a of the drilling portion 136a is stretched, the cup portion 133 can be easily drilled.

本発明の属する技術分野の通常の知識を有する者は、本発明が、その技術的思想や必須の特徴を変更せずとも、他の具体的な形態に実施され得ることを理解できるはずである。そのため、以上で記述した実施形態は全ての面において例示的なものであり、限定的ではないものとして理解しなければならない。本発明の範囲は、前記詳細な説明よりは後述する特許請求の範囲によって表わされ、特許請求の範囲の意味及び範囲、そして、その均等概念から導出される多様な実施形態が本発明の範囲に含まれるものとして解釈されなければならない。 Those who have ordinary knowledge of the technical field to which the present invention belongs should understand that the present invention can be implemented in other specific embodiments without changing its technical ideas or essential features. .. Therefore, the embodiments described above are exemplary in all respects and should be understood as not limiting. The scope of the present invention is represented by the scope of claims, which will be described later rather than the detailed description, and the meaning and scope of the claims and various embodiments derived from the concept of equality thereof are the scope of the present invention. Must be interpreted as included in.

１，１ａ 二次電池
２ 電池モジュール
１０ 電極組立体（Ｅｌｅｃｔｒｏｄｅ Ａｓｓｅｍｂｌｙ）
１１ 電極タブ（Ｅｌｅｃｔｒｏｄｅ Ｔａｂ）
１２ 電極リード（Ｅｌｅｃｔｒｏｄｅ Ｌｅａｄ）
１３ 電池ケース
１４ 絶縁部
２０ ハウジング
１１１ 正極タブ
１１２ 負極タブ
１２１ 正極リード
１２２ 負極リード
１３１ 上部ケース
１３２ 下部ケース
１３３ コップ部
１３４ シーリング部
１３５，１３５ａ 圧電素子（Ｐｉｅｚｏｅｌｅｃｔｒｉｃ Ｅｌｅｍｅｎｔ）
１３６，１３６ａ 打孔部
１３３１ 収容空間
１３５１ 導線
１３６１，１３６１ａ 一端
１３６２ 他端 1,1a Rechargeable battery 2 Battery module 10 Electrode assembly
11 Electrode Tab
12 Electrode Lead
13 Battery case 14 Insulation part 20 Housing 111 Positive electrode tab 112 Negative electrode tab 121 Positive electrode lead 122 Negative electrode lead 131 Upper case 132 Lower case 133 Cup part 134 Sealing part 135, 135a Piezoelectric element
136, 136a Drilling part 1331 Accommodation space 1351 Conductor 1361, 1361a One end 1362 Other end

Claims (17)

電極及び分離膜を交互積層して形成される電極組立体と、
前記電極組立体を内部に収容する電池ケースと、
前記電池ケースにおいて前記電極組立体を収容するコップ部の外側に配置される圧電素子と、
一端が鋭く形成されていると共に、他端が前記圧電素子に電気的に接続される打孔部と、を含み、
前記圧電素子は、前記電池ケースの体積が膨張して、圧力が印加されると前記打孔部に電力を供給し、
前記打孔部は前記圧電素子から電力が印加されると、前記一端が前記電池ケースに向かって延伸し、前記電池ケースを打孔する二次電池。 An electrode assembly formed by alternately laminating electrodes and separation membranes,
A battery case that houses the electrode assembly inside,
In the battery case, a piezoelectric element arranged outside the cup portion for accommodating the electrode assembly, and
One end is sharply formed and the other end includes a drilling portion electrically connected to the piezoelectric element.
The piezoelectric element supplies electric power to the hole-drilled portion when the volume of the battery case expands and pressure is applied.
A secondary battery in which one end of the hole is extended toward the battery case when electric power is applied from the piezoelectric element, and the hole is made in the battery case. 前記打孔部は、
電気活性ポリマー（ＥＡＰ）からなる、請求項１に記載の二次電池。 The hole is
The secondary battery according to claim 1, which comprises an electroactive polymer (EAP). 前記圧電素子は、
前記コップ部の外面に付着される、請求項１または２に記載の二次電池。 The piezoelectric element is
The secondary battery according to claim 1 or 2, which is attached to the outer surface of the cup portion. 前記圧電素子は、
前記コップ部の中心部に付着される、請求項１～３の何れか一項に記載の二次電池。 The piezoelectric element is
The secondary battery according to any one of claims 1 to 3, which is attached to the center of the cup portion. 前記圧電素子は、
前記コップ部と形状が互いに対応している、請求項１～４の何れか一項に記載の二次電池。 The piezoelectric element is
The secondary battery according to any one of claims 1 to 4, wherein the cup portion and the shape correspond to each other. 前記圧電素子と連結された導線は、
前記打孔部の他端に連結される、請求項１～５の何れか一項に記載の二次電池。 The conducting wire connected to the piezoelectric element is
The secondary battery according to any one of claims 1 to 5, which is connected to the other end of the hole. 前記打孔部は、
前記電池ケースにおいて前記コップ部を打孔する、請求項１～６の何れか一項に記載の二次電池。 The hole is
The secondary battery according to any one of claims 1 to 6, wherein the cup portion is punched in the battery case. 前記打孔部は、
前記電池ケースのシーリング部に密着して形成される、請求項１～７の何れか一項に記載の二次電池。 The hole is
The secondary battery according to any one of claims 1 to 7, which is formed in close contact with the sealing portion of the battery case. 前記打孔部の他端は、
前記電池ケースの頂点に位置する、請求項８に記載の二次電池。 The other end of the hole is
The secondary battery according to claim 8, which is located at the apex of the battery case. 前記打孔部は、
前記電池ケースで周縁に沿って形成される前記シーリング部の一部に密着して形成される、請求項８に記載の二次電池。 The hole is
The secondary battery according to claim 8, which is formed in close contact with a part of the sealing portion formed along the peripheral edge of the battery case. 電極及び分離膜を交互積層して形成される電極組立体、前記電極組立体を内部に収容する電池ケース、前記電池ケースにおいて前記電極組立体を収容するコップ部の外側に配置される圧電素子、及び、一端が鋭く形成されていると共に、他端が前記圧電素子に電気的に接続される打孔部、を含み、
前記圧電素子は、前記電池ケースの体積が膨張して、圧力が印加されると前記打孔部に電力を供給し、
前記打孔部は前記圧電素子から電力が印加されると、前記一端が前記電池ケースに向かって延伸し、前記電池ケースを打孔する二次電池と、
前記二次電池を内部に収容するハウジングとを含む電池モジュール。 An electrode assembly formed by alternately laminating electrodes and separation films, a battery case for accommodating the electrode assembly inside, and a piezoelectric element arranged outside a cup portion accommodating the electrode assembly in the battery case. And, one end thereof is sharply formed , and the other end includes a drilling portion electrically connected to the piezoelectric element.
The piezoelectric element supplies electric power to the hole-drilled portion when the volume of the battery case expands and pressure is applied.
When electric power is applied from the piezoelectric element, one end of the hole-drilled portion extends toward the battery case, and a secondary battery for making a hole in the battery case.
A battery module including a housing for accommodating the secondary battery inside. 前記打孔部は、
電気活性ポリマー（ＥＡＰ）からなる、請求項１１に記載の電池モジュール。 The hole is
The battery module according to claim 11, which is made of an electroactive polymer (EAP). 前記圧電素子は、
前記ハウジングの内面に付着される、請求項１１または１２に記載の電池モジュール。 The piezoelectric element is
The battery module according to claim 11 or 12, which is attached to the inner surface of the housing. 前記打孔部は、
前記ハウジングの内側角に沿って密着して形成される、請求項１１～１３の何れか一項に記載の電池モジュール。 The hole is
The battery module according to any one of claims 11 to 13, which is formed in close contact with each other along the inner corner of the housing. 前記打孔部は、
前記電池ケースにおいて前記コップ部を打孔する、請求項１１～１４の何れか一項に記載の電池モジュール。 The hole is
The battery module according to any one of claims 11 to 14, wherein the cup portion is punched in the battery case. 請求項１１～１５の何れか一項に記載の電池モジュールを含む電池パック。 A battery pack comprising the battery module according to any one of claims 11 to 15. 請求項１６に記載の電池パックを含むデバイス。 The device comprising the battery pack according to claim 16.
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